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3 years ago

In the equation below, identify the Brønsted-Lowry acid, the Brønsted-Lowry base, conjugate acid, conjugate base.

Chemistry

1 answer:

AnnyKZ [126]3 years ago

7 0

Answer:

Explanation:

Your B-L Acid is a proton (Hydrogen, H+) donor, and your B-L base is a proton acceptor. This means that the base will take a hydrogen from your acid. NO2- is a B-L base, and you can tell it is a base by the negative charge it possesses. This means that it has a lone pair that wants to grab one of the hydrogens from NH4+, the B-L acid. In scientific words, the NO2- is a nucleophile and NH4+ is an electrophile. The result of NO2- grabbing that hydrogen from NH4+ is that NO2- becomes HNO2 (your conjugate acid) and and NH4+ becomes NH3 (you conjugate base). Basically, any time a B-L acid loses a proton, its equal product will be its conjugate base, and any time a B-L base gains a proton, its equal product will be its conjugate acid.

I hope this helped explain the concept behind Bronsted-Lowry acids and bases! Good luck with your class and please don't forget to give a positive rating! :-)

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An exergonic reaction __________ free energy, and an endergonic reaction __________ free energy.

Rashid [163]

An exergonic reaction proceeds with net release of free energy.
An endergonic reaction absorbs free energy

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2 years ago

Ima Chemist found the density of Freon-11 (CFCl3) to be 5.58 g/L under her experimental conditions. Her measurements showed that

PIT_PIT [208]

If we assume this two gases behave like ideal gas, then we use the ideal gas law $PV=nRT$ , where P is the pressure, V is the volume, n number of moles, R gas constant and T the temperature in kelvins. As well as the density formula $D=\frac{m}{V}$ . First we calculate the molarity for Freon

$CFCl_3 = (12+ 18.998 + 3 \times 35.453) =137.36\ g/mol$ .

The number of moles for freon are

$D=\frac{m}{V} =\frac{ nM}{L} \implies n= \frac{DL}{M} = \frac{5.58 g \times L}{L \times 137.36g/mol}= 0.0406 mol$

We know $n=\frac{m}{M}$ , so we insert this concept to our ideal gas equation

$PV=n \times RT=\frac{m}{M} \times RT= \frac{mRT}{M}$ . Since $D=\frac{m}{V}$ , we insert this concept to the formula

$PV=\frac{mRT}{M} \\P=\frac{mRT}{VM} = \frac{DRT}{M} \\\\\implies M= \frac{DRT}{P}$ . The measurements take place in same conditions so,

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3 years ago

Explain the differences between an ionic crystal like "NaCl" (Sodium Chloride) and a metal like Fe (Iron).

lesantik [10]

Answer:

salt is weaker and has looser atomic bonds and iron has stronger and tighter ionic bonds

Explanation:

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3 years ago

Which pair represents isotopes?

Taya2010 [7]

Answer:

A. All of the other answers are correct

Explanation:

Each pairs are from the same elements, meaning they share the same atomic number but different nucleon number (neutron number + atomic number). Thus, all of the answers are correct.

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3 years ago

Read 2 more answers

Reduce the following equation to a net ionic equation: 2Na+ + SO4^2- + Ba^2+ + 2Cl^- ---> 2Na^+ + 2Cl^- + BaSOv4

Eduardwww [97]

net ionic equation

B) SO₄²⁻ (aq) + Ba²⁺ (aq) → BaSO₄ (s)

Explanation:

We have the following chemical equation:

2 Na⁺ (aq) + SO₄²⁻ (aq) + Ba²⁺ (aq) + 2 Cl⁻ (aq) → 2 Na⁺ (aq) + 2 Cl⁻ (aq) + BaSO₄ (s)

To get the net ionic equation we remove the spectator ions and we get:

SO₄²⁻ (aq) + Ba²⁺ (aq) → BaSO₄ (s)